21442020555250 has 32 divisors (see below), whose sum is σ = 40139854425216. Its totient is φ = 8576724473200.

The previous prime is 21442020555239. The next prime is 21442020555323. The reversal of 21442020555250 is 5255502024412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29502729 + ... + 30220771.

It is an arithmetic number, because the mean of its divisors is an integer number (1254370450788).

Almost surely, 2^{21442020555250} is an apocalyptic number.

21442020555250 is a deficient number, since it is larger than the sum of its proper divisors (18697833869966).

21442020555250 is a wasteful number, since it uses less digits than its factorization.

21442020555250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837507 (or 837497 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 37.

Adding to 21442020555250 its reverse (5255502024412), we get a palindrome (26697522579662).

The spelling of 21442020555250 in words is "twenty-one trillion, four hundred forty-two billion, twenty million, five hundred fifty-five thousand, two hundred fifty".